Append is a thread-safe version of the Go built-in append function.

Filter is a thread-safe function that returns a new slice containing only the elements in the input slice s for which the specified function f is true.

Get is a thread-safe function to get a value by key k in a slice.

Len is a thread-safe function to get the length of a slice.

Map is a thread-safe function that returns a new slice that contains each of the elements of the input slice s mutated by the specified function.

Reduce is a thread-safe function that applies the reducing function f to each element of the input slice s, and returns the value of the last call to f.

Set is a thread-safe function to assign a value v to a key k in a slice s.